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BSC 108 ALABAMA Exam 1 2025

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Domain Eukarya contains animals, plants, protists, and fungi. - Correct Ans-True The process of keeping internal conditions constant is known as - Correct Ans Homeostasis The levels of biological organization, in order from least complex to most complex, are: biosphere, ecosystems, communities, populations, organisms, organ systems, organs, tissues, cells, atoms, molecules. - Correct Ans-False A new species has been discovered. Individuals of this species are multicellular eukaryotes that obtain nutrients from decomposing organic matter. In which domain should this species be classified? - Correct Ans-domain Eukarya Communities are more complex than populations. - Correct Ans-true What is the lowest level of structure that can perform all activities required for life? - Correct Ans-cells A tentative explanation of an observation is - Correct Ans-hypothesis A collection of hypotheses that have been repeatedly tested without rejection is called a - Correct Ans-theory The three domains of life are: - Correct Ans-Eukarya, Archaea, Bacteria What is the difference between hypothesis and theory? - Correct Ans-A theory is much broader in scope than a hypothesis and is generally supported by an accumulation of extensive and varied evidence. Describe one theory that unifies biology as a science. - Correct Ans-The theory of evolution by natural selection unifies biology as a science because it accounts for the unity and diversity of life on Earth. This theory states that there is an overproduction of offspring and competition for resources, and variation exists among individual offspring. Unequal reproductive success (natural selection) among these offspring is the mechanism of evolution. What are the steps used in the scientific method? Use an example to illustrate the steps of the scientific method. - Correct Ans-a)Observations, Question, Hypothesis, Prediction, Test, Revise hypothesis or Make additional predictions and test them. Example: I observe that my flashlight does not work. I question whether the batteries are dead. I hypothesize that the dead batteries are causing my flashlight to not work properly. I predict that changing the batteries will cause the flashlight to work again. I BSC108 BSC108 test my prediction by replacing the batteries with new ones. If the flashlight works, my hypothesis was correct. If not, perhaps make a new hypothesis that the light bulb is dead and need replacement. What is the function of nucleic acids? - Correct Ans-To store and transmit hereditary information. Which of the following macromolecules function in energy storage? - Correct Ans carbohydrates Which subatomic particle has a negative charge? - Correct Ans-electron Which of the following is NOT a component of an atom? - Correct Ans-positron Which of the following is a single-stranded nucleic acid? - Correct Ans-RNA An element is found to contain 33 electrons, 33 protons, and 22 neutrons. Which of the following is true? - Correct Ans-Its atomic number is 33 and its atomic mass is 55. Steroids belong to which class of macromolecules? - Correct Ans-lipids Which of the following best summarizes the relationship between dehydration reactions and hydrolysis? - Correct Ans-Dehydration reactions assemble polymers and hydrolysis breaks down polymers. Oxygen forms two ______________ bonds with hydrogen atoms to form a water molecule. - Correct Ans-polar covalent The subunits of proteins are _________________. The subunits are connected by______________ bonds. - Correct Ans-amino acids, peptide The functions of lipids include acting as enzymes and producing movement. - Correct Ans-false What are three properties of water? - Correct Ans-High specific heat allows for temperature regulation, good solvent, cohesive and adhesive, polar, ice floats. How does hydrolysis affect macromolecules? - Correct Ans-Hydrolysis is the addition of a water molecule to one of the covalent bonds of a polymermacromolecule, breaking the bond and releasing monomer subunits. Which of the following is NOT found in a prokaryotic cell? - Correct Ans-mitochondrion Which of the following is capable of converting light energy to chemical energy? - Correct Ans-chloroplast BSC108 BSC108 Proteins are made at the - Correct Ans-ribosomes Which organelle is the site of cellular respiration, where cells convert food energy into chemical energy? - Correct Ans-mitochondrion Which organelle stores the cell's DNA? - Correct Ans-nucleus Animal cells have chloroplasts but plant cells do not. - Correct Ans-false Select the molecule NOT normally found in plasma membranes. - Correct Ans-DNA Which of the following types of molecules are the major structural components of the cell membrane? - Correct Ans-phospholipids and proteins The organelle that manufactures lipids is the: - Correct Ans-endoplasmic reticulum Both plant and animal cells have plasma membranes. - Correct Ans-true Which of the following statements about prokaryotic and eukaryotic cells is FALSE? - Correct Ans-Both prokaryotic and eukaryotic cells contain DNA in a nucleus. What are three differences between a prokaryotic cell and a eukaryotic cell? - Correct Ans-Prokaryotic cells are smaller, simpler, and have fewer organelles than eukaryotic cells. Prokaryotic cells lack membrane-bound organelles including a nucleus but include ribosomes. They are also older in an evolutionary sense. What are the functions of the cytoskeleton? - Correct Ans-To maintain cell shape and to assist in the movement of organelles. The active site of an enzyme - Correct Ans-both b and c are correct (B. is the part of the enzyme where its substrate can fit. C. can be used over and over again.) Which of the following is NOT TRUE of energy? - Correct Ans-Potential energy cannot be converted to kinetic energy. The movement of molecules from high concentration to low concentration is - Correct Ans-diffusion In order for an enzyme to work properly - Correct Ans-all are true (a. it must have a particular shape. b. the temperature must be within certain limits. c. the pH must be within certain limits.) An enzyme catalyzes a reaction by - Correct Ans-lowering the energy of activation of a reaction BSC108 The process by which cells take in large solid material by vesicle formation is called - Correct Ans-phagocytosis

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BSC108



BSC 108 ALABAMA Exam 1 2025

Domain Eukarya contains animals, plants, protists, and fungi. - Correct Ans-True

The process of keeping internal conditions constant is known as - Correct Ans-
Homeostasis

The levels of biological organization, in order from least complex to most complex, are:
biosphere, ecosystems, communities, populations, organisms, organ systems, organs,
tissues, cells, atoms, molecules. - Correct Ans-False

A new species has been discovered. Individuals of this species are multicellular
eukaryotes that obtain nutrients from decomposing organic matter. In which domain
should this species be classified? - Correct Ans-domain Eukarya

Communities are more complex than populations. - Correct Ans-true

What is the lowest level of structure that can perform all activities required for life? -
Correct Ans-cells

A tentative explanation of an observation is - Correct Ans-hypothesis

A collection of hypotheses that have been repeatedly tested without rejection is called a
- Correct Ans-theory

The three domains of life are: - Correct Ans-Eukarya, Archaea, Bacteria

What is the difference between hypothesis and theory? - Correct Ans-A theory is much
broader in scope than a hypothesis and is generally supported by an accumulation of
extensive and varied evidence.

Describe one theory that unifies biology as a science. - Correct Ans-The theory of
evolution by natural selection unifies biology as a science because it accounts for the
unity and diversity of life on Earth. This theory states that there is an overproduction of
offspring and competition for resources, and variation exists among individual offspring.
Unequal reproductive success (natural selection) among these offspring is the
mechanism of evolution.

What are the steps used in the scientific method? Use an example to illustrate the steps
of the scientific method. - Correct Ans-a)Observations, Question, Hypothesis,
Prediction, Test, Revise hypothesis or Make additional predictions and test them.
Example: I observe that my flashlight does not work. I question whether the batteries
are dead. I hypothesize that the dead batteries are causing my flashlight to not work
properly. I predict that changing the batteries will cause the flashlight to work again. I

BSC108

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